Alexy, R. (2002). A theory of constitutional rights (J. Rivers, Trans.). Oxford University Press.
Barak, A. (2012). Proportionality: Constitutional rights and their limitations. Cambridge University Press.
Beatty, D. M. (2004). The ultimate rule of law. Oxford University Press.
Cohen-Eliya, M., & Porat, I. (2013). Proportionality and constitutional culture. Cambridge University Press.
Emiliou, N. (1996). The principle of proportionality in European law: A comparative study. Kluwer Law International.
Jackson, V. C. (2015). Constitutional law in an age of proportionality. Yale Law Journal, 124(8), 3094–3196.
Klatt, M., & Meister, M. (2012). The constitutional structure of proportionality. Oxford University Press.
Stone Sweet, A., & Mathews, J. (2008). Proportionality balancing and global constitutionalism. Columbia Journal of Transnational Law, 47(1), 72–164.
Sullivan, E. T., & Frase, R. S. (2020). Proportionality principles in American law: Controlling excessive governmental actions. Oxford University Press.
Tsakyrakis, S. (2009). Proportionality: An assault on human rights? International Journal of Constitutional Law, 7(3), 468–493. https://doi.org/10.1093/icon/mop011